#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector <ll>;
struct Fenwick { // 0-indexed
vll tree;
ll n;
Fenwick (ll n): tree(n, 0), n(n) {}
ll query (ll ql, ll qr) { return query(qr) - query(ql-1); }
ll query (ll at) { // 0-indexed
ll ans = 0;
for (; at >= 0; at &= at+1, at--) ans += tree[at];
return ans;
}
void update (ll at, ll val) { // 0-indexed
for (; at < n; at |= at+1) tree[at] += val;
}
};
ll count_swaps (vector <int> vei) {
vll ve(vei.size());
ll n = ve.size()/2;
for (ll i = 0; i < 2*n; i++) ve[i] = vei[i];
Fenwick ft(2*n); // ft[i] means that there are now ft[i] shoes in position i
ll ans = 0;
for (ll i = 0; i < 2*n; i++) {
ft.update(i, 1);
}
vll next(2*n, -15);
{vector <queue <ll> > nextqs(n+1);
for (ll i = 2*n-1; i >= 0; i--) {
queue <ll> &q = nextqs[abs(ve[i])];
if (!q.size() || ve[q.front()] == ve[i]) { // not complement
q.push(i);
} else { // complements
next[i] = q.front();
q.pop();
}
}}
for (ll i = 0; i < 2*n; i++) {
ll j = next[i];
if (j < 0) continue;
ans += ft.query(i+1, j-1) + (ve[i] > 0); // extra flip
ft.update(j, -1); // makes it 0
ft.update(i, 1); // irrelevant but, still, two shoes are now here
}
return ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
360 KB |
Output is correct |
6 |
Correct |
1 ms |
344 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
344 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
344 KB |
Output is correct |
16 |
Correct |
0 ms |
600 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
1 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
604 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
436 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
1 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
800 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
600 KB |
Output is correct |
9 |
Correct |
0 ms |
436 KB |
Output is correct |
10 |
Correct |
0 ms |
600 KB |
Output is correct |
11 |
Correct |
1 ms |
344 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
344 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
344 KB |
Output is correct |
17 |
Correct |
1 ms |
600 KB |
Output is correct |
18 |
Correct |
1 ms |
1116 KB |
Output is correct |
19 |
Correct |
1 ms |
1116 KB |
Output is correct |
20 |
Correct |
6 ms |
7772 KB |
Output is correct |
21 |
Correct |
6 ms |
7772 KB |
Output is correct |
22 |
Correct |
62 ms |
75044 KB |
Output is correct |
23 |
Correct |
58 ms |
75092 KB |
Output is correct |
24 |
Correct |
62 ms |
75324 KB |
Output is correct |
25 |
Correct |
68 ms |
75976 KB |
Output is correct |
26 |
Correct |
69 ms |
75276 KB |
Output is correct |
27 |
Correct |
56 ms |
75068 KB |
Output is correct |
28 |
Correct |
63 ms |
75880 KB |
Output is correct |
29 |
Correct |
64 ms |
75968 KB |
Output is correct |
30 |
Correct |
64 ms |
75860 KB |
Output is correct |
31 |
Correct |
61 ms |
75088 KB |
Output is correct |
32 |
Correct |
66 ms |
75860 KB |
Output is correct |
33 |
Correct |
64 ms |
75856 KB |
Output is correct |
34 |
Correct |
66 ms |
75860 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
63 ms |
75860 KB |
Output is correct |
38 |
Correct |
63 ms |
75920 KB |
Output is correct |
39 |
Correct |
62 ms |
75916 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
82 ms |
75348 KB |
Output is correct |
6 |
Correct |
64 ms |
75268 KB |
Output is correct |
7 |
Correct |
73 ms |
75160 KB |
Output is correct |
8 |
Correct |
62 ms |
76112 KB |
Output is correct |
9 |
Correct |
69 ms |
75264 KB |
Output is correct |
10 |
Correct |
73 ms |
75252 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
360 KB |
Output is correct |
6 |
Correct |
1 ms |
344 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
344 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
344 KB |
Output is correct |
16 |
Correct |
0 ms |
600 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
1 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
604 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
436 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
1 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
1 ms |
604 KB |
Output is correct |
41 |
Correct |
1 ms |
1116 KB |
Output is correct |
42 |
Correct |
1 ms |
1116 KB |
Output is correct |
43 |
Correct |
1 ms |
1116 KB |
Output is correct |
44 |
Correct |
1 ms |
1116 KB |
Output is correct |
45 |
Correct |
1 ms |
1116 KB |
Output is correct |
46 |
Correct |
1 ms |
1116 KB |
Output is correct |
47 |
Correct |
1 ms |
960 KB |
Output is correct |
48 |
Correct |
1 ms |
1112 KB |
Output is correct |
49 |
Correct |
1 ms |
1116 KB |
Output is correct |
50 |
Correct |
1 ms |
1116 KB |
Output is correct |
51 |
Correct |
1 ms |
1116 KB |
Output is correct |
52 |
Correct |
1 ms |
1116 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
360 KB |
Output is correct |
6 |
Correct |
1 ms |
344 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
344 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
344 KB |
Output is correct |
16 |
Correct |
0 ms |
600 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
1 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
604 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
436 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
1 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
1 ms |
800 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
1 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
0 ms |
348 KB |
Output is correct |
42 |
Correct |
1 ms |
600 KB |
Output is correct |
43 |
Correct |
0 ms |
436 KB |
Output is correct |
44 |
Correct |
0 ms |
600 KB |
Output is correct |
45 |
Correct |
1 ms |
344 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
0 ms |
344 KB |
Output is correct |
48 |
Correct |
0 ms |
348 KB |
Output is correct |
49 |
Correct |
0 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
344 KB |
Output is correct |
51 |
Correct |
1 ms |
600 KB |
Output is correct |
52 |
Correct |
1 ms |
1116 KB |
Output is correct |
53 |
Correct |
1 ms |
1116 KB |
Output is correct |
54 |
Correct |
6 ms |
7772 KB |
Output is correct |
55 |
Correct |
6 ms |
7772 KB |
Output is correct |
56 |
Correct |
62 ms |
75044 KB |
Output is correct |
57 |
Correct |
58 ms |
75092 KB |
Output is correct |
58 |
Correct |
62 ms |
75324 KB |
Output is correct |
59 |
Correct |
68 ms |
75976 KB |
Output is correct |
60 |
Correct |
69 ms |
75276 KB |
Output is correct |
61 |
Correct |
56 ms |
75068 KB |
Output is correct |
62 |
Correct |
63 ms |
75880 KB |
Output is correct |
63 |
Correct |
64 ms |
75968 KB |
Output is correct |
64 |
Correct |
64 ms |
75860 KB |
Output is correct |
65 |
Correct |
61 ms |
75088 KB |
Output is correct |
66 |
Correct |
66 ms |
75860 KB |
Output is correct |
67 |
Correct |
64 ms |
75856 KB |
Output is correct |
68 |
Correct |
66 ms |
75860 KB |
Output is correct |
69 |
Correct |
0 ms |
348 KB |
Output is correct |
70 |
Correct |
0 ms |
348 KB |
Output is correct |
71 |
Correct |
63 ms |
75860 KB |
Output is correct |
72 |
Correct |
63 ms |
75920 KB |
Output is correct |
73 |
Correct |
62 ms |
75916 KB |
Output is correct |
74 |
Correct |
0 ms |
348 KB |
Output is correct |
75 |
Correct |
0 ms |
348 KB |
Output is correct |
76 |
Correct |
1 ms |
348 KB |
Output is correct |
77 |
Correct |
0 ms |
348 KB |
Output is correct |
78 |
Correct |
82 ms |
75348 KB |
Output is correct |
79 |
Correct |
64 ms |
75268 KB |
Output is correct |
80 |
Correct |
73 ms |
75160 KB |
Output is correct |
81 |
Correct |
62 ms |
76112 KB |
Output is correct |
82 |
Correct |
69 ms |
75264 KB |
Output is correct |
83 |
Correct |
73 ms |
75252 KB |
Output is correct |
84 |
Correct |
0 ms |
348 KB |
Output is correct |
85 |
Correct |
0 ms |
348 KB |
Output is correct |
86 |
Correct |
0 ms |
348 KB |
Output is correct |
87 |
Correct |
1 ms |
604 KB |
Output is correct |
88 |
Correct |
1 ms |
1116 KB |
Output is correct |
89 |
Correct |
1 ms |
1116 KB |
Output is correct |
90 |
Correct |
1 ms |
1116 KB |
Output is correct |
91 |
Correct |
1 ms |
1116 KB |
Output is correct |
92 |
Correct |
1 ms |
1116 KB |
Output is correct |
93 |
Correct |
1 ms |
1116 KB |
Output is correct |
94 |
Correct |
1 ms |
960 KB |
Output is correct |
95 |
Correct |
1 ms |
1112 KB |
Output is correct |
96 |
Correct |
1 ms |
1116 KB |
Output is correct |
97 |
Correct |
1 ms |
1116 KB |
Output is correct |
98 |
Correct |
1 ms |
1116 KB |
Output is correct |
99 |
Correct |
1 ms |
1116 KB |
Output is correct |
100 |
Correct |
1 ms |
1112 KB |
Output is correct |
101 |
Correct |
6 ms |
7916 KB |
Output is correct |
102 |
Correct |
6 ms |
7768 KB |
Output is correct |
103 |
Correct |
70 ms |
75172 KB |
Output is correct |
104 |
Correct |
66 ms |
75180 KB |
Output is correct |
105 |
Correct |
65 ms |
75220 KB |
Output is correct |
106 |
Correct |
69 ms |
75232 KB |
Output is correct |
107 |
Correct |
60 ms |
75092 KB |
Output is correct |
108 |
Correct |
71 ms |
75232 KB |
Output is correct |
109 |
Correct |
62 ms |
75956 KB |
Output is correct |
110 |
Correct |
64 ms |
76088 KB |
Output is correct |
111 |
Correct |
73 ms |
75088 KB |
Output is correct |
112 |
Correct |
70 ms |
75264 KB |
Output is correct |
113 |
Correct |
65 ms |
75092 KB |
Output is correct |
114 |
Correct |
73 ms |
75264 KB |
Output is correct |
115 |
Correct |
68 ms |
75044 KB |
Output is correct |